337 



Gibson (A.). Common Garden Insects and their Control.— Domw. 



Canada, Dept. Agric, Entom. Branch, Ottawa, Circ. no. 9, April 

 1917, 20 pp. [Received 31st May 1917.] 



This paper is a well-arranged and concise resume of the facts con- 

 cerning the occurrence and control of common insect pests in gardens. 



The following formulae for the preparation of standard insecticides are 

 given : — For biting insects — Paris green for liquid application, 4 oz. to 

 40 gals, water with about | lb. fresh lime added ; for dry application, 



1 lb. Paris green mixed with 20 lb. of land plaster [sic], slaked 

 lime or other perfectly dry powder, to be applied early in the morning 

 when the plants are wet with dew. To render Paris green adhesive, 



2 lb. resin and 1 lb. of sal soda (crystals) in 1 gal. water should be 

 boiled together for one hour and added to the Paris green liquid for 

 plants with waxy leaves, such as cabbages. This quantity is sufficient 

 for 40 gals. 



With arsenate of lead, 2 lb. powder or 4 lb. paste are used in 40 gals, 

 water. For use in small quantities, 1 tablespoonful of the paste is 

 sufficient for 1 gal. water. 



Bordeaux mixture consists of : — Copper sulphate (bluestone) 4 lb., 

 unslaked lime 4 lb., water (one barrel) 40 gals. To test this, let one 

 drop of potassium ferrocyanide fall into the mixture, and if this turns 

 reddish-brown add more milk of lime till no change takes place. When 

 using Bordeaux mixture against the potato beetle [Leptinotarsa 

 decemlineata], it must be poisoned by using either 6 lb. copper sulphate, 

 8 oz. or more of Paris green, 4 lb. of arsenate of lead paste to 40 gals, 

 water, or preferably, 8 oz. Paris green and 1| lb. powdered lead 

 arsenate to 40 gals, water. 



Poisoned bran mixture, for cutworms and locusts is composed of : — 

 Bran, 20 lb. ; molasses, 1 quart ; Paris green, ^ lb. ; water, 2 to 3 gals. 



For sucking insects. Kerosene emulsion : — Kerosene (coal oil), 

 2 gals. ; rainwater, 1 gal. ; soap, h lb. For small quantities use 

 kerosene, 1 quart ; flour, 8 oz. ; water, 2 gals. Whale-oil or fish-oil 

 soap should be used for brown or black Aphids at the strength of 

 1 lb. to 4 gals, water, and for green Aphids 1 lb. to 6 gals, water. Two 

 widely-used trade preparations of tobacco extract are " Nickoteen " 

 and " Black Leaf 40." It is advisable to add soap to these when 

 diluted, at the rate of 2 lb. to 40 gals, of the mixture. Sulphur-soap 

 mixture for red spider (Tetranychus) consists of flowers of sulphur, 

 1 oz. ; laundry soap, 2 oz. ; water, 1 gal. 



Beelese (A.), Aspidiotiphagus, How., e Prospaltella, Ashm. — Redia, 

 Florence, xii, no. 1-2, 25th April 1917, pp. 1-13. 



This paper deals with the identity or otherwise of the Chalcid genera 

 Aspidiotiphagus, How., and Prospaltellct, Ashm., and the opinion is 

 expressed that they should be kept distinct, though Prospaltella 

 lounsburyi, Berl. & Paoli, is now placed in the former genus. 



Malenotti (E.). Metalaptus torquatus, n. gen. e n. specie di Calcidite. 



[Metalaptus torquatus, a new Genus and Species of Chalcididae.] — 

 Redia, Florence, xii, no. 1-2, 25th April 1917, pp. 339-341, 1 plate. 



The Mymarid, Metalaptus torquatus, gen. et sp. n., from orange leaves 

 attacked by Chrysomphalus dictyospermi, Morg., is here described. 

 (C381) Wt. P5/131. 1,500. 8.17. B,& F.Ltd. Gp.11/3. a 



